The present expression of radiation of an accelerated point charge is only approximately valid. The exact expression of radiation of an accelerated point charge is derived based on special relativity, and using the Larmor formulation for the radiation of an charged particle being accelerated, but instantaneously at rest. The totaled radiation power obtained by the exact expression is the same as Liénard’s generalization of the Larmor formula.

Conflicts in land exploration are incisive social problems which have been the subject in many studies. Risk assessment of land conflicts is effective to resolve such problems. Specifically, fuzzy mathematics and the analytic hierarchy process were combined together to evaluate risk in land conflicts in our work, which is proved useful to solve uncertainty and imprecision problems. Based on the analysis of the principles for the risk assessment of a land conflicts index system, a set of risk assessment indexes using (...) the fuzzy analytic hierarchy process was presented. The results show that the overall risk is at medium level, and the risk of the feasibility index and controllability index need to be paid more attention to. The contribution of this article is reflected in two aspects: the application of FAHP in risk assessments of land conflicts is effective and valid; it is helpful for governments to establish a stricter management system of work safety for conflicts in land exploration based on the risk assessment results. (shrink)

Drawing on social exchange theory and benevolent leadership literature, we show how the largesse associated with benevolent leadership can cause subordinates to feel obliged to undertake illegitimate tasks assignments that go beyond their job duties. The hypotheses are tested in a scenario experimental study and a multisource, time-lagged field survey. Both studies indicate that benevolent leadership evokes indebtedness in subordinates (called felt obligation), which is then indirectly related to their willingness to undertake illegitimate tasks. The second study shows that subordinates (...) who try to avoid actions that damage relationships (called disintegration avoidance) and those who feel job insecurity are most willing to perform illegitimate assignments. Practical implications for curbing workplace exploitation are discussed. (shrink)

This meta-analysis examines the relationship between materialism and subjective wellbeing in the Chinese population. Fifty-six relevant studies covering the period from 1998 to 2022 were included in the meta-analysis. Fifty-eight independent effect sizes from a total of 52,368 participants were obtained to calculate the mean effect sizes. Materialistic values correlated with significantly lower subjective wellbeing, while the mean effect size for extrinsic aspirations was found to be not significant. The effect sizes varied across different types of wellbeing outcomes. The associations (...) were also moderated by certain demographic factors, methodological factors, publication features, and economic indicators. We discuss our limitations and the implications for future research. (shrink)

This study aimed to reveal the characteristics of multi-circuit brain synergy between elite tai chi chuan athletes in resting and exercise states and to provide neuroimaging evidence of improvements in brain function by motor skill training. Functional near-infrared spectroscopy was used to compare the brain activity of professional tai chi chuan athletes and beginners in resting and exercise states, and to assess functional connectivity between the prefrontal lobe and the sensorimotor zone. In the resting state, the FC between the left (...) prefrontal lobe and the right sensorimotor area in the expert group was significantly lower than that in the novice group. In the exercise state, the patterns of FC between the left prefrontal lobe and right sensorimotor area, the right prefrontal lobe and left sensorimotor area, and the left and right sensorimotor areas in the expert group were significantly lower than that in the novice group. From the resting state to the locomotor state, the expert group experienced a greater absolute value of functional connection increment between the left prefrontal cortex and right sensorimotor area, and between the left sensorimotor area and right sensorimotor area. This was positively correlated with the self-evaluation results of motor performance behavior. Under sports conditions, professional athletes’ multi-circuit brain FC strength is significantly reduced, and their elite motor skill performance supports the neural efficiency hypothesis. This may be related to the high adaptation of the brain to specific tasks and the improvement of the integration of somatic perception processing and motor function. (shrink)

It has been widely assumed and proven that a firm’s research and development investment is limited if the availability of cash flow is constrained. The purpose of this study is to verify the opposite proposition: whether firms invest heavily in R&D when more cash flow is available. This paper discusses the heterogeneous relationship between cash flow from different sources and the R&D investment of firms. The study divides the firm’s cash flow into three categories according to the business activities that (...) generate firm finance: cash flow from operating activities, cash flow from investing activities, and cash flow from financing activities. On this basis, a dynamic R&D investment model is constructed, and the relevant data for Chinese listed firms are used for the empirical research. The study finds that Chinese listed firms do not necessarily spend more cash on R&D investment, even if the availability of cash flow is not constrained. For young firms, CFO and CFI do not significantly correlate with R&D investment, and CFF significantly negatively correlates with R&D investment. For mature firms, the correlations between cash flow generated from different activities and R&D investment are nonsignificant. (shrink)

Objective: Based on how the identity of doctoral students is recognized and understood in the context of Chinese culture, we developed a doctoral identity scale using both qualitative and quantitative analyses.Methods: The initial project of the Scale was formed through qualitative analyses and expert consultation. Nine hundred and ninety-one doctoral students were officially tested, and 982 valid questionnaires were obtained. They were randomly divided into two parts, and 491 of which were assessed for item Response Theory and exploratory factor analysis (...) and 491 of which were assessed for confirmatory factor analysis. The Subjective Well-Being Scale, the Rosenberg Self-Esteem Scale, and the Psychological Sense of School Membership Scale were used to test its the criterion-related validity. One hundred and forty-one students were selected for retesting after 8 weeks.Results: The doctoral student identity questionnaire consisted of two factors identity exploration and identity commitment, explaining 57% of the total variance. The results of CFA showed that the two-factor model fitted the data well. The two dimensions of the Doctoral Student Identity Scale were significantly and positively correlated with the two dimensions of the SWB scale, the latent factor of the RSE scale, and the latent factor of the PSSM scale. Composite reliability values for exploration and commitment were 0.79 and 0.83 respectively, and the values of McDonald’s omega for exploration and commitment were 0.81 and 0.85 respectively. The test-retest reliability of the total questionnaire was 0.842.Conclusion: The Doctoral Student Identity Scale was developed with good reliability and validity, and can be used as a reliable tool for measuring the doctoral student identity. In addition, the questionnaire will provide corresponding ideas and methods for studying the identity issues of specific groups. (shrink)

It is believed in many studies that the servitization of manufactures is driven by internal economy, but the situation in China may be somewhat different. In this study, we consider the influence of external institutional environment on manufacturers’ servitization and the final performance, and discuss the moderating effect of organizational identity orientation on firms’ response to external institutional pressures. We conduct a survey where we collect responses from 312 manufacturers in China. Regression analyses are performed to test whether institutional pressures (...) coming from the external institutional environment have a positive effect on the level of manufacturing servitization or not. Moreover, we study if this positive effect is moderated by the individualistic identity orientation and the relational identity orientation. We also examine the impact of servitization strategy on manufacture’s market performance and financial performances. Furthermore, we separate out the influences comes from institutional pressures by using a new estimated method and try to explain the cause of “servitization paradox.” Our study is innovative in that it bridges the servitization and institutional theory, and provides practical guidance for the adoption of manufacturing servitization strategy. (shrink)

The fuzzy clustering algorithm has been widely used in the research area and production and life. However, the conventional fuzzy algorithms have a disadvantage of high computational complexity. This article proposes an improved fuzzy C-means algorithm based on K-means and principle of granularity. This algorithm is aiming at solving the problems of optimal number of clusters and sensitivity to the data initialization in the conventional FCM methods. The initialization stage of the K-medoid cluster, which is different from others, has a (...) strong representation and is capable of detecting data with different sizes. Meanwhile, through the combination of the granular computing and FCM, the optimal number of clusters is obtained by choosing accurate validity functions. Finally, the detailed clustering process of the proposed algorithm is presented, and its performance is validated by simulation tests. The test results show that the proposed improved FCM algorithm has enhanced clustering performance in the computational complexity, running time, cluster effectiveness compared with the existing FCM algorithms. (shrink)

The issue of left-behind children has become a key focus in China. In this study, we investigate the mediating role of social support between social anxiety and the subjective quality of life among left-behind children in China. A total of 710 junior high school students were recruited using clustering random sampling from five middle schools in China and investigated using the Social Anxiety Scale for Children, Social Support Rating Scale for Adolescents, and Inventory of Subjective Life Quality. The results show (...) that social anxiety is negatively associated with social support and subjective quality of life, and social support is positively correlated with subjective quality of life. In addition, social support partially mediates the relationship between social anxiety and subjective quality of life. In conclusion, these findings provide new insights to improve the subjective quality of life of left-behind children. The focus should be on alleviating social anxiety and increasing social support in order to help left-behind children improve their subjective quality of life. (shrink)

In this first original collection of essays on Catholic Biblical Ethics ever done in English, renowned Jesuit moral theologian James Keenan brings together distinct voices from numerous cultures and language groups. The result is a volume representing a truly global community of Catholic ethics scholars. The Bible and Catholic Theological Ethics deepens contemporary understandings of the relationship between the Holy Bible and the world of Catholic ethical reflection. Like the four other books in the prestigious CTEWC Series, this volume aims (...) at offering a more systematic, comprehensive, and global perspective than typical Anglo-centric or North American-focused offerings. (shrink)

Hydromechanical continuously variable transmission is capable of bearing large torque and has wide transmission range, which is suitable for high-power tractors. Dynamic characteristics could influence the tractor life, especially in a high-power tractor. Wet clutch is the crucial component in the HMCVT, which could smooth and soft power transmission. Therefore, it is important to study the dynamic characteristics and implement the wet clutch test of HMCVT. In this paper, AMESim is used to establish virtual models of gearbox, pump-controlled hydraulic motor (...) system, and shifting hydraulic system. Then, a simulation study of tractor operation under working condition is carried out. The internal and external meshing forces of the planetary row are analyzed. Finally, the wet clutch engagement process of HMCVT in the high-power tractor is tested to verify the oil pressure. The simulation results show that the values of internal and external meshing force become larger as the throttle opening increases. At the moment of shifting change, the meshing forces of the planetary gear have great impact. The clutch test shows that the trend of the oil filling curve obtained from the bench test is similar to that obtained from the theoretical curve, which verifies the simulation results. (shrink)

Quotations from Lu Xun's criticism of Confucianism.

First I briefly review the emergence and development of business ethics, following three stages (1978–1984; 1984–1994; 1994 to the present) and driven by four factors: the inheritance of Chinese traditional ethics; the influence of Marxist philosophy and ethics; the reflections on the economic reform; and the influence of business ethics from abroad. Then, from a practical and a theoretical perspective, I discuss the main challenges for business ethics in China: issues of the economic system, of corporate ethics, and of management. (...) After commenting on the role of business ethics for the social development in China, I offer some reflections about what China can contribute to, and learn from, other peoples. (shrink)

Accurate short-term traffic flow modeling is an essential prerequisite to analyze and control traffic flow. Canonical data-driven methods are a large account of parameters that may be underfitted with limited training samples, yet they cannot adaptively boost their understanding of the spatiotemporal dependencies of the traffic flow. The noisy and unstable traffic flow data also prevent the models from effectively learning the underlying patterns for forecasting future traffic flow. To address these issues, we propose an easy-to-implement yet effective boosting model (...) based on extreme gradient boosting and enhance it by wavelet denoising for short-term traffic flow forecasting. The discrete wavelet denoising is employed to preprocess the noisy traffic flow data. Then, the denoised training datasets are reconstructed to train the extreme gradient boosting model. These two components are integrated seamlessly in a unified framework, and the whole framework can retain the features in the data as much as possible. Our model can precisely capture the hidden spatial dependency in the data. Extensive experiments are conducted on four benchmark datasets compared with frequently used models. The results demonstrate that the proposed model can precisely capture the hidden spatial dependency of the traffic flow data and achieve superior performance. (shrink)

Lu Jia's New Discourses: A Political Manifesto from the Early Han Dynasty is a readable yet accurate translation by Paul R. Goldin and Elisa Levi Sabattini. Celebrated as "a man-of-service with a mouth [skilled] at persuasion", Lu Jia (c. 228-140 BCE) became one of the leading figures of the early Han dynasty, serving as a statesman and diplomat from the very beginning of the Han empire. This book is a translation of Lu Jia's New Discourses, which laid out the reasons (...) for rise and fall of empires. Challenged by the new Emperor to produce a book explaining why a realm that was conquered on horseback cannot also be ruled on horseback, Lu Jia produced New Discourses, to great acclaim. (shrink)

Lun Xun's collected anti-Confucianist writings.